两晋南朝太子洗马之“清选”与东宫秘书机构之发育

汉初,太子洗马始行任子制,其地位较庶子、舍人为高。三国两晋间,太子洗马新增“准秘书郎”之职责,成为东宫秘书机构发育的开端。因洗马“典文书”,其选任以“文书才义”为标准。又因掌释奠之事,“才义”实包含“美谈论”的内容。“掌文翰”即为洗马之“清”的具体内涵。宋、齐洗马选任“皆取甲族有才望”者,洗马一职多为显贵子弟所挤占。梁武帝复以“文书才义”选任,并设立典经局,将东宫秘书机构建制化,并注重其“典文书”职能。源自两汉、发育于魏晋的东宫秘书机构,至萧梁时基本成型。     

我国城乡居民收入差距的省际差异及其影响因素——基于面板数据的空间计量分析

首先利用泰尔指数测度了我国省域城乡居民收入差距,对我国城乡居民收入差距的省际差异进行了空间探索性分析,结论为:东北及东部沿海地区收入差距最小,中部地区次之,西部地区收入差距最大。随后根据2000~2012年全国31个省、直辖市、自治区的面板数据,利用空间面板滞后模型从经济发展水平与经济结构、经济开放程度、财政支出与金融发展以及教育等方面分析了省际差异产生的原因。最后,对缩小城乡居民收入差距提出了相应的政策建议。     

An Objective Bayesian Criterion to Determine Model Prior Probabilities

We discuss the problem of selecting among alternative parametric models within the Bayesian framework. For model selection problems, which involve non‐nested models, the common objective choice of a prior on the model space is the uniform distribution. The same applies to situations where the models are nested. It is our contention that assigning equal prior probability to each model is over simplistic. Consequently, we introduce a novel approach to objectively determine model prior probabilities, conditionally, on the choice of priors for the parameters of the models. The idea is based on the notion of the worth of having each model within the selection process. At the heart of the procedure is the measure of this worth using the Kullback–Leibler divergence between densities from different models.     

我国少数民族村寨生育行为与理性选择的分析

本文基于云南大学中国少数民族村寨调查资料,对少数民族人口生育行为的微观机制进行了 分析,对宏观人口政策导向下构建的“现代生育模式”以及现代生育文化理论进行了评议,提出应 在传统生育理性命题下认识少数民族生育行为的现实存在,并基于个人生育理性实现从传统到现 代转变的观点。     

Bayesian spatial prediction of skew and censored data via a hybrid algorithm

A correct detection of areas with excess of pollution relies first on accurate predictions of pollutant concentrations, a task that is usually complicated by skewed histograms and the presence of censored data. The unified skew-Gaussian (SUG) random field proposed by Zareifard and Jafari Khaledi [19] offers a more flexible class of sampling spatial models to account for skewness. In this paper, we adopt a Bayesian framework to perform prediction for the SUG model in the presence of censored data. Owing to the presence of many latent variables with strongly dependent components in the model, we encounter convergence issues when using Monte Carlo Markov Chain algorithms. To overcome this obstacle, we use a computationally efficient inverse Bayes formulas sampling procedure to obtain approximately independent samples from the posterior distribution of latent variables. Then they are applied to update parameters in a Gibbs sampler scheme. This hybrid algorithm provides effective samples, resulting in some computational advantages and precise predictions. The proposed approach is illustrated with a simulation study and applied to a spatial data set which contains right censored data.     

教学研究型大学内部管理改革的策略选择

教学研究型大学与研究型、教学型大学的发展彼此牴牾,身处国内外高校挤压、定位目标模糊与体制机制不畅的困境之中。办学自主权、管理人员投入、科学化管理水平、校院两级管理改革均不尽如人意,内部管理严重制约内涵特色发展与质量水平提升,改革势在必行。遵循学术规律和管理规律,加强章程建设、大学回归宪章时代;探索职员制、管理者回归本位;改革校院两级管理、学院回归本位,可能是当前教学研究型大学内部管理改革的策略选择。     

企业战略联盟的伙伴选择

企业战略联盟目前在全球范围内蓬勃兴起。越来越多的企业将其作为获得竞争优势、促进技术创新、分散经营风险、降低经营成本的重要战略。尽管战略联盟受到企业界的青睐,然而约有一半的联盟最终失败,其中一个重要的原因是联盟伙伴选择错误。选择正确的合作伙伴是建立战略联盟时不容忽视的重要环节。本文提出了战略联盟伙伴选择的步骤、原则和方法,对我国企业发展战略联盟具有指导意义。     

作业成本法下的成本动因选择研究

Homburg教授提出了作业成本法下成本动因的最优化选择模型,但是并没有对该模型要依赖的成本动因集合进行相关性分析,不能保证所选择成本动因的相关性和独立性.本文在Homburg教授的模型基础上,运用偏相关性分析和假设检验,保证了所选择成本动因的相关性和独立性,从而避免了Homburg教授的模型可能得出的不合理结果.     

Bayesian and Dominant‐Strategy Implementation in the Independent Private‐Values Model

We prove—in the standard independent private‐values model—that the outcome, in terms of interim expected probabilities of trade and interim expected transfers, of any Bayesian mechanism can also be obtained with a dominant‐strategy mechanism.     

遗传算法在WMS货位优化分配中的应用

从一汽轿车股份有限公司仓储中心WMS的实际业务出发,考虑物料的进出库频率和货架的受力情况,为货位分配问题建立多目标优化模型.利用遗传算法中的并列选择法,设计遗传算子并进行求解.优化后结果表明:可以减少堆垛机的运行距离,合理安排货物的分配,减少人工作业,提高仓储的利用效率,降低企业成本.